Large-billed bird (6)
I believe the answer is:
toucan
'large-billed bird' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for toucan that I've seen before include "A pair could be able for this bird, by the sound of it" , "Showy bird" , "Bird with large colourful beak" , "Coloured tropical bird with a large beak" , "Large-beaked bird" .)